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Tag: "ice" at biology news

Secrets of the sea yield stronger artificial bone

...the ocean. When seawater freezes, crystals of pure ice form layers, while impurities such as salt and microorganisms are expelled from the forming ice and entrapped in channels between the ice crystals. The result is a layered structure that roughly r...

Vital ocean prey play active role in environment

...nt on microorganisms found on the underside of sea ice for food, and as they grow they drift with pack ice. After they metamorphose in late winter and early spring, the juveniles move with the currents back to inshore waters. In summer, the juveniles are found inshore of the adults. The life cycle thus k...

Medieval diaries aid scientists ascertain increase in hot spots due to global warming

...dence from as far back as AD 800 (from tree rings, ice cores and shells). The study found evidence for ...eratures. Ice from cores drilled in the Greenland ice sheets revealed which years were warmer than others by the chemical composition of the ice. They a...

Thin tough skin, slow-growing gills protect larval Antarctic fish

...ve the freezing point and is regularly filled with ice crystals. "The way that we've understood how adul...water at almost -2 degrees Celsius. "With all this ice around, there is no way they can prevent freezing," Cheng said. "At -2 degrees Celsius, internal flu...

High-tech tags on marine animals yield valuable data for biologists and oceanographers

...continental shelf of Antarctica at the edge of the ice pack. Southern elephant seals, in contrast, forage widely in the offshore waters. The SEaOS project led by SMRU's Fedak is deploying electronic tags on elephant seals at three locations in the Southern Ocean. The oceanographic data gathered by the ...

Why the Amazon rainforest is so rich in species

... the pattern expected if forest refuges during the ice ages were causing the origin of new species ?the r...llion years ago. In this theory, the Pleistocene ice ages trapped water near the poles, leading to reduced sea levels and supposedly to periods of profou...

Microbes under Greenland Ice may be preview of what scientists find under Mars' surface

...frozen at the bottom of Greenland's two-mile thick ice sheet could help guide scientists searching for si...armer than that found at the base of the Greenland ice sheet, according to UC Berkeley lead researcher P. Buford Price, a professor of physics. This woul...

Students discover 11,000 year old remains of Irish Elk

...n a 'kettle hole' ?a hollow created when blocks of ice melt, now exposed in the eroding the cliff face. Its stratigraphic position, high up in the kettle hole, may provide a later date for the presence of giant deer on the island than previous studies. The antler, dubbed 'Erica the Elk' by the students,...

Scientists sequence DNA of woolly mammoth

...e than 10,000 years before the maximum of the last ice age. The research team used a computational appro... that any organism that has been trapped in frozen ice or a permafrost environment for up to one million years will be an open book to the researchers. Th...

Tsunami + 1 year: Reviving exhausted fisheries should trump replacing boats, gear, experts say

...eh, for example, 83 fish landing facilities and 20 ice plants were destroyed, along with about 40% of the small-scale fishing fleet and associated gear. Indonesia estimates damages to its capture fisheries sector at US$ 52 million. WorldFish Director-General Stephen Hall says that while delivery of aid...

Science's Breakthrough of the Year: Watching evolution in action

...tense tropical cyclones to continued reductions in ice cover in the Arctic Ocean and altered bird migratory patterns, scientific evidence for climate change built up in 2005 and non-scientists seem to have listened. Cell Signaling Steps Up: Dynamic views of how cells respond to the chemical and environ...

Gene therapy may protect normal tissues during radiation retreatment for lung cancer

The ice ages made massive changes to the Earth's landscape The ice ages made massive changes to the Earth's landscape. But what was happening below the ice in the ocea...

Seafloor creatures destroyed by ice action during ice ages

The ice ages made massive changes to the Earth's landscape The ice ages made massive changes to the Earth's landscape. But what was happening below the ice in the ocea...

New antifreeze protein found in fleas may allow longer storage of transplant organs

...emselves against freezing is capable of inhibiting ice growth by about six Celsius degrees. This would al...sity Biological Station." Using a process called ice affinity purification, the team isolated the new protein, which is rich in an amino acid called glyc...

Study shows big game hunters, not climate change, killed off sloths

Prehistoric big game hunters and not the last ice age are the likely culprits in the extinction of giant ground sloths and other North American great mammals such as mammoths, mastodons and saber-toothed tigers, says a University of Florida researcher. Determining whether the first arrival of human...

Women feel more pain than men, research shows

...r two minutes before transferring the hand into an ice water bath maintained at a temperature of 1 - 2 degrees centigrade. The cold pressor tank allows researchers to monitor the pain threshold (the point at which volunteers first notice the pain) and pain tolerance (the point at which volunteers can no...

Freeze-dried mats of microbes awaken in Antarctic streambed

...0 years and has seen the collapse of several major ice shelves and significant glacial thinning in recent years, according to several international studies. The McMurdo Dry Valleys region consists of glaciers, open expanses of barren ground, stream channels and permanently ice-covered lakes. The life fo...

Israeli scientists successfully transplant frozen-thawed ovaries in sheep

...hat allows precise control over the propagation of ice crystals during the freezing process, thus reducing the damage caused to cells by conventional methods[4]. Sheep were chosen because their ovaries are similar to those of humans. The technique worked ?the frozen-thawed ovaries produced comparable num...

World-first technology enables study of ancient bacteria

...es in "gas hydrates" ?a super concentrated methane ice that contains more carbon than all conventional fossil fuels and, therefore, a potentially enormous energy source. However, we know little about gas hydrates as they melt during recovery due to the fall in pressure. Professor R. John Parkes, of the ...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...eric circulation patterns or to a reduction in sea ice in the summer or to an increase in cloud cover. The observed summer temperature increases are likely related to a global warming trend that has led to a longer snow-free season and an increase in the extent of woody vegetation. Both of these changes...

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